APA ציטוט
Orr, E. L., & Orr, W. N. (2012). Oregon geology (6th ed.). Oregon State University Press.
Chicago Style (17th ed.) Citation
Orr, Elizabeth L., and William N. Orr. Oregon Geology. 6th ed. Corvallis: Oregon State University Press, 2012.
ציטוט MLA
Orr, Elizabeth L., and William N. Orr. Oregon Geology. 6th ed. Oregon State University Press, 2012.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.